[vr] Introduce ColorScheme

chrome/browser/android/vr_shell/color_scheme.h

Index: chrome/browser/android/vr_shell/color_scheme.h
diff --git a/chrome/browser/android/vr_shell/color_scheme.h b/chrome/browser/android/vr_shell/color_scheme.h
new file mode 100644
index 0000000000000000000000000000000000000000..d483336ab6a5e82c70ff351079068c5ff94c350f
--- /dev/null
+++ b/chrome/browser/android/vr_shell/color_scheme.h
@@ -0,0 +1,28 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_ANDROID_VR_SHELL_COLOR_SCHEME_H_
+#define CHROME_BROWSER_ANDROID_VR_SHELL_COLOR_SCHEME_H_
+
+#include "device/vr/vr_types.h"
+
+namespace vr_shell {
+
+struct ColorScheme {
+  // TODO(vollick): Add support for incognito.
+  enum Mode : int { kModeNormal = 0, kModeFullscreen, kNumModes };
+
+  static const ColorScheme& GetColorScheme(Mode mode);
+
+  // These colors should be named generically, if possible, so that they can be
+  // meaningfully reused by multiple elements.
+  vr::Colorf horizon;
+  vr::Colorf floor;
+  vr::Colorf ceiling;
+  vr::Colorf grid;
+};
+
+}  // namespace vr_shell
+
+#endif  // CHROME_BROWSER_ANDROID_VR_SHELL_COLOR_SCHEME_H_